Reversing mechanism



J. V. PETRELLI. BEVERSING MECHANISM. APPLICAHDN FILED JULY 15, m9

Patented Apr. 20, 1920.

3 SHEETS-SHEET l- J. V. PETRELLI.

REVEBSING MECHANISM.

APPUCAHON man JULY H.191!)- Patented Apr. 20, 1920.

3 SHEETS-SHEET 2.

my/Q 1 J. V. PETRELU.

REVERSiNG MECHANISM APPLICM'EON man JULY 15,1919.

1,337,531 Patented Apr. 20, 1920.

3 SHEETS-SHEET 3- wardly extendin JOSEPH V. YE'I'BELLI, OF NEW HAVEN, CONNECTICUT, AfiSIGNOR TO THE NAVY GEAR MANUFACTURING CORPORATION, OF NEW HAVEN, CONNECTICUT, A COBIOBATIDN 01' DELAWARE.

REVERSING MECHANISM.

Specification of Letters latent.

Patented Apr. 20, 1920.

Epplioation filed July 16, 1919. Serial-11o. 310,984:

To all whom it may concern:

Be it known that I, J osarlr V. Pn'rnnnm, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Reversing Mechanism; and I do hereby declare the following, when t akenin connection with the accompanying drawings and thecharacters of reference marked thereon, tobe a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-

igure l a plan view of a reversing mechanism embodying my invention, showing the parts in position for the reverse drive, and the driving and driven shafts blfilifill away.

Fig. 2 a view thereof partly in section and partly in elevation, on the line 2-2 of of the drivingl ii 1.

ig. 3 a detached view I of double-pinmember with its complement ions.

Fig. 1 an end view thereof.

My invention relates to an improved reversing mechanism primarily designed for motorboat use, but not so limited, the ob- 'ject being to produce a simple, strong, durable, compact and etficient mechanism.

W'ith these ends in view, my invention consists in a reversing, mechanism having its durivinp and driven members connected by two internal gears which are coupled together for the forward drive and geared to ether for the reverse drive.

lVIy invention further consists in a reversing mechanism having certain details of construction as will be hereinafterdescribed and pointed out in the claims In carrying out In invention as herein shown, I employ a ulcrum internal gear 3 and a driven internal gear 4, respectively carried by the driving and driven members of the mechanism, as will be hereinafter de scribed. The said gears 3 and 4 are geared together by three pairs of equally spaced double-pinions 5 having bronze or other suitable metal bushings 6 and mounted upon pintles 7 entered at their respective ends into the flanges 8 and 9 of an inte ral driving-member also comprising. a .orwardly extending bearingsleeve 10 and a rearconcentric trunnion 11, the flanges 8 an( 9 being united by three equidistant transverse webs 12, as shown in Fig. 4:. The smaller pinion-unit of each of the double-pinions meshes into the fulcrum internal gear 3, while the larger pinion unit of each-of the double-pinions meshes into the driven internal fiear 4, the larger pinion-unit havin as s own, double the numberof 'eeth o the smaller-pinion unit. For the reverse drive, the driven internal gear 4 will, therefore, be reversely rotated with twice thespeed of the fulcrum internalthis matter of speed will.

gear 3. However, depend upon the relative sizes of the pinionunits of the double pinions and may be varied as desired.

As herein shown, the internal gears 3 and 4 are normally coupled for the forward drive by a friction cone-clutch comprising male and female members 13 and 14 separated by a tapered wearing-ring 15 of bronze or other suitable metal. The male clutchmember 13 upon the inner face of which the fulcrum internal gear 3 is formed, is made integral with the rear face of a circular case-cover 16 mounted upon the sleeve 10, from, which it is separated by a wearing ring 17 ofbronze or equivalent material, the sleeve 10 receiving; the driving-shaft 18 to which it is fastened by a key 19.

The said case-cover 16 fits over the open end of the cylindrical case-body 20 to which it is secured by bolts 21, the case-body being furnished with a rearwardly extending sleeve 22 separated by a wearing-ring 23 from the sleeve 24 of the cup-shaped drivenmember 25, the said sleeve being fastened by a key 26 to the driven shaft 27 and providing a bearing for the trunnion 11 of the driving-member which turns within a wearing-ring 28 set into its forward end. The female member 14, aforesaid, of the friction cone-clutch is formed within the forward edge of the flange 29 of the said. drivenmember which has the driven internal. gear 4 formed upon the inner face of the said flange.

It will be seen from the foregoing, that the driving and driven members of the mechanism are respectively provided for coupling the said driving and driven members for the forward drive.

For: applying the friction clutch for 'the forward drive, when the entire gear-mechanism revolves as a unit,-I employ, as herein shown, three short compression plungers 31 mounted in the rear wall of the case-body 20 in position to have their projecting rounded outer ends engaged by the faces 32 of three cam-levers 33 rocking upon screwpivots 34 set radially -in a ring 3:) slidably mounted upon the rearwin'dlv projecting bearing-sleeve 22 of the case-body, and held in place thereon by the key 36 and a nut 36. The outer ends of the said levers arc pivotally connected by links 37, with complementary arms 38 radiating from a sleeve 39, on the driven-shaft 2?. The said Sleeve 39 is formed with an annular groove 41 receiving a two-part collar the parts 42 of which are secured together by screws 43 and rcspectively furnished with studs 44 roceivin: the slotted arms 4:? of a yoke 40 mounted upon a horizontal shaft 4-? having an open ating handle which is not shown. lly mounting the cam-levers 213 as described. they are not affected hr the action of centrifugal force. the pivots on which they turn being at a right angle to the axis on which the mechanism as a whole rotates. 'l'ho in nor onds oi' the compression-1ilungors H act upon the ontor disk of a multiple-disk t'ric tion clutch 4 H the disks of which are interposed between the case-bod) 2t) and the head 25 of the driven member. .\s shown. the said multiple-disk friction clutch comprises three disks of which the outer disks are connected in any suitable manner with the casebody. while the intermediate disk is connected in any suitable man-tor with the driven mcmber. ()t' course the number of disks may be varied as desired. Furthermore. if desired. this multiple-disk friction clutch may take the place of the friction cone clutch or vice versa. or both may be employed as shown. or a single disk providing a \vcaring-surface may be interposed to tween the compressionplnngcls and the driven member.

For the reverse drive. the housing is gripped and held against rotation by means of a brakc-ln|nd it entering a circuml'oreio tial recess in the outer face of tho housing bodfv: d formed with perforated horizon tal arms 5H by means of which the rcvorsing mcchanism as an ontirctv. is installed in place. The adjacent ends of thc brakelnunl, are provided with armsfil mounting rollers 52 respectively located within slots 53 inclinod with respect to each other and formed in the forward end of a horizontal camplate- 54, the rear end of which is connected by an cywbolt 55 with a forked link 56 attached to the upper cml ol' thoyokc it? which operates the brake-band at the same time that it operates the described toggle-.

mechanism controlling the I'riction-clutches. A set-screw 57 is provided for tho adjustment of the brake-ham] in the usual manner.

For the forward drive. the shaft 47 is manuall turned so as toapply the frictioncone clutch and throw oil tho brake, whereby the driving and driven members are frictionally coupled together and revolved as a. unit with the base, and other parts of the mechanism with the exception of the brake mechanism, the yoke 46 and the ring 42. At this time, that is, during the for 'ard drive, the gears revolve upon the axis of the mechanism as upon a center, but do not turn with respect to each other.

For the reverse drive, the brake mechanism is operated to grip the case and hold the same against rotation, and at the same time throw of! the friction clutches between the respective internal gears so that the driven internal gear is free to rotate independently of the fulcrum internal gear, now held against rotation with the case. As the (lll\'lIlQ'-Illtll]l)tl rotates, and it always ro tatcs: in the same direction, the teeth of the internal fulcrum internal gear 3 form points of purchase for the rotation of the double pinions which thus effect the rotation of the driven internal gear in the opposite direc tion at a rate of speed determined In the gear ratio. liv employing two internal gears as described, the drive is made easy and quiet. and the strain upon the gear teeth reduced to the minimum. The mechanism is also made more powerful bv the use of the internal gears as more teeth are simultaneously in mesh than under the old method.

1. reversing mechanism having a fulcrum internal gear, adriven internal gear. pinions connecting the said internal "ears for ofi'ecting the reverse rotation of the driven internal gear for the reverse drive. and means for coupling the two gears for the forward drive.

A reversing mechanism having a fill crum internal goal, a driven internal gear. double pinions connecting the said internal gears for effecting the reverse rotation of the driven internal gear for the reverse drive, and means for coupling the two gears for the forward drive.

3. A reversing mechanism having a ful crum internal gear, a driven internal gear. pinions connecting the said internal gears for cl'l'octing the reverse rotation of the driven internal gear for the reverse drive, and a friction clutch for coupling the two gears for the forward drive.

4. A reversing mechanism having a fulcrum internal gear. a driven internal gear.

a driving member located within the said gears. pmions carried by the said driving member and respectively engaging with the said internal gears for effecting the reverse rotation of the, driven internal gear for the reverse drive, and means for coupling the two gears: for, the forward drive.

5. A reversing mechanism having a fulcrum internal gear, a driven internal gear,

a driving member located within the said gears, double pinions carried by the driving member and respectively engaging with the said internal gears for effecting the reverse rotation of the driven internal gear for the reverse drive, and means for couplin the two internal gears for the forward drive.

6. A reversing mechanism having a case,

a fulcrum internal gear, a driven internal gear, means for con ling the two internal gears for the forwar drive, adriving-mcmher located within the said gears, and com prising a sleeve, two flanges and a trunnion; and plnions mounted between the flanges of the said driving-member and respectively engaging with the said internal gears for effectin the reverse rotation of the driven interna gear for the reverse drive at which time the fulcrum internal gear is held against rotation with the said case. 7 A reversing mechanism, having a ful crum internal gear, a driven'internal gear, pinions connecting the said internal gears for effecting the reverse rotation of the driven internal gear for the reverse drive, and a friction-cone. clutch for coupling the two gears for the forward drive.

8. In a reversing mechanism, the combination with a case provided with a fulcrum internal gear, of a driving member carrying pinions, a driven-member provided with a driven internal gear, the said fulcrum internal and driven internal gears being connected by the said pinions which efi'eet the reverse rotation of the driven internal gear for the reverse drive, and means for coupling the two gears for the forward drive.

9. In a reversing mechanism, the combination with a case comprising a casebody and a cover therefor, of a fulcrum internal gear located upon a rearward extension of the said cover, a drivemmember located within the said case and comprising a head and a ring, and the said ring belng rovided with a driven internal gear, a drivinginember located within the said case, pinions carried by the said driving-member and coactin with the said driving and driven gears for effecting the reverse rotation of the driven internal gear for the reverse pi'nions carried by drive, means for holding the case against rotation, and a friction-cone clutch formed upon the said case-cover and ring for coupling the two gears for the forward drive.

10. In a reversing mechanism, the combination with a fulcrum internal gear, of a driven internal gear, a driving-member,

pinions carried by the said member for connecting the said gears for effecting the re verse rotation of the driven internal gear for the reverse drive, a friction clutch for coupling the two gears for the forward drive, plungers and cam-mechanism for ap-- plying the said clutch, including cam-levers acting upon the said plnngors, which operate upon the driven internal gear.

11. In a reversing mechanism. the combination with the case thereof, of a fulcrum internal gear connecting therewith, a driven internal car, a driving-member carrying the said rive'n internal gear, )inions car ried by the driving-memher and connecting the said fulcrum internal and driven internai gears for effecting the reverse rotation of the driven internal gear for the reverse drive, means for coupling the two gears for the forward drive, means for holding the case against rotation for the forward drive, and means, operating upon the driven-memher for applying the said coupling-means.

12. In a reversing mechanism, the combination with a fulcrum internal gear, of a driven internal gear, a drivirig-member, the said driving-n1emher and connecting the said gears for effecting the reverse rotation of the driven internal gear for the reverse drive, a friction clutch for connecting the two gears for the forward drive. and cam-mechanism for applying the said. clutch, including cam-levers turning on pivots arranged at a right angle to the axis of the mechanism, whereby the action of centrifugal force upon the said levers is nullified.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

JOSEPH V. PETR ELLI.

Witnesses:

Fnnnnmo C. FAARLE, CLARA L. ern. 

